Stator of flat wire motor and flat wire motor

Abstract

The utility model provides a stator of a flat wire motor and the flat wire motor. The flat wire winding is provided with a three-phase winding, the number of poles is 6, the number of winding grooves is 54, six layers are formed in the grooves, each phase of winding comprises six branches, each phase of winding occupies three continuous winding grooves on each pole, the winding of each branch is embedded into the same groove position in the first layer and the second layer, the winding of each branch is embedded into the same groove position in the third layer and the fourth layer, and the winding of each branch is embedded into the same groove position in the fifth layer and the sixth layer. The slots embedded in the first layer and the second layer, the slots embedded in the third layer and the fourth layer and the slots embedded in the fifth layer and the sixth layer of the winding of each branch are different from one another. According to the stator of the flat wire motor, the winding structure is simple, the size of the end part is small, and the winding reliability is high. The flat wire motor has the same advantages.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a stator of a flat wire motor using flat wires as windings. Background Art

[0002] Taking the motor of new energy vehicles as an example, the motor stator using flat wire as winding has a higher copper full rate, which can improve the power density of the motor.

[0003] The flat wire windings of existing stators are mainly divided into a hairpin type (Hair-pin) welded at one end or a straight wire type (I-pin) welded at both ends. Both types require a large number of bending and welding connections of the wires. If problems such as cold soldering occur during the manufacturing process, the conductive performance and reliability of the winding will be affected, and thus the overall performance of the motor will be affected.

[0004] In addition, for a 6-pole 54-slot flat wire stator, the existing winding rules are difficult to meet the requirements of stator miniaturization. Utility Model Content

[0005] The purpose of the present application is to overcome or at least alleviate the deficiencies of the above-mentioned prior art and to provide a stator of a flat wire motor and a flat wire motor.

[0006] According to a first aspect of the present application, a stator of a flat wire motor is provided, comprising an iron core and a flat wire winding, wherein the flat wire winding has a three-phase winding, the number of poles of the flat wire winding is 6, and the number of winding slots of the iron core is 54, wherein:

[0007] The flat wire winding forms 6 layers in the slots, and the flat wire winding of each phase includes 6 branches.

[0008] The flat wire winding of each phase occupies three consecutive winding slots at each pole, namely the first slot position, the second slot position and the third slot position.

[0009] The winding of each branch is embedded in the same slot in the first and second layers, in the same slot in the third and fourth layers, and in the same slot in the fifth and sixth layers, and the slots embedded in the first and second layers, in the third and fourth layers, and in the fifth and sixth layers of the winding of each branch are different from each other.

[0010] The winding of each branch is continuously embedded across layers between the 1st and 2nd layers and traverses each pole in the circumferential direction, then continuously embedded across layers between the 3rd and 4th layers and traverses each pole in the circumferential direction, then continuously embedded across layers between the 5th and 6th layers and traverses each pole in the circumferential direction.

[0011] In at least one embodiment, the intervals between adjacent slots in which the winding of each branch is embedded between the first layer and the second layer, between the third layer and the fourth layer, and between the fifth layer and the sixth layer are all 9.

[0012] In at least one embodiment, the intervals between adjacent slots in which the winding of each branch is embedded between the second layer and the third layer and between the fourth layer and the fifth layer is 8 or 11.

[0013] In at least one embodiment, each branch is wound in the form of a continuous wave winding.

[0014] In at least one embodiment, the six branches are connected in series.

[0015] In at least one embodiment, every three branches of the six branches are connected in series to form a small branch, and two of the small branches are connected in parallel.

[0016] In at least one embodiment, every two branches of the six branches are connected in series to form a small branch, and three of the small branches are connected in parallel.

[0017] In at least one embodiment, the incoming line end of each branch is located at the radial innermost side, and the outgoing line end of each branch is located at the radial outermost side; or

[0018] The inlet end of each branch is located at the outermost side in the radial direction, and the outlet end of each branch is located at the innermost side in the radial direction.

[0019] In at least one embodiment, the incoming terminals of the six branches per phase are located at two adjacent poles, and the outgoing terminals of the six branches per phase are located at two adjacent poles.

[0020] According to a second aspect of the present application, a flat wire motor is provided, which includes the stator of the flat wire motor provided according to the first aspect of the present application.

[0021] The stator winding structure of the flat wire motor according to the present application is simple, the end size is small, and the winding reliability is high. The flat wire motor according to the present application has the same advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 and Figure 2 It is a three-dimensional schematic diagram of a stator of a flat wire motor according to an embodiment of the present application.

[0023] Figure 3 It is a front schematic diagram of a stator of a flat wire motor according to one embodiment of the present application.

[0024] Figure 4 It is a front schematic diagram of a winding of a stator of a flat wire motor according to an embodiment of the present application.

[0025] Figure 5 1 is a schematic top view of a stator winding of a flat wire motor according to an embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of three schematic branch connection modes of the windings of a flat wire motor according to an embodiment of the present application.

[0027] Figure 7 It is a schematic diagram of the wiring sequence of one phase winding of the stator of a flat wire motor according to an embodiment of the present application.

[0028] Explanation of reference numerals: S stator; W winding. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0030] Reference Figures 1 to 7 According to an embodiment of the present application, a stator of a flat wire motor (hereinafter referred to as a stator) includes an iron core S and a winding W. The winding W is embedded in a winding slot (hereinafter referred to as a slot) of the iron core S.

[0031] In the present application, the winding includes three phases, the number of poles of the winding is 6, the number of winding slots of the iron core S is 54, and the winding of each phase includes 6 branches.

[0032] In this embodiment, each branch is wound in the form of a continuous wave winding. Figure 4 and Figure 5 The winding of each branch is formed by a long wire that is repeatedly bent in a wavy shape and spiraled circumferentially to form a cage-shaped winding. After the winding is formed, it can be temporarily contracted and deformed radially inward and embedded in the winding groove as a whole. There are no welding points in the branch, which can reduce the welding resistance; it also reduces the height of the end of the winding protruding from the core S, so that the space occupied by the winding in the axial direction is small; the reduction in the end height further reduces the DC resistance of the winding, that is, reduces the motor loss and improves the operating efficiency of the motor. At the same time, since there are no welding points in the branch, the reliability of the winding is greatly improved.

[0033] The six branches of each phase can be connected in series, such as Figure 6 As in case (iii) in the figure, this connection method is particularly suitable for high-voltage platforms (e.g. 800V) and asynchronous motors. The six branches per phase can also form a hybrid, for example Figure 6In case (i), every two branches are connected in series to form a small branch, and three small branches are connected in parallel. This situation is more suitable for low-voltage platforms (such as 400V); for example Figure 6 In case (ii), every three branches are connected in series to form a small branch, and two small branches are connected in parallel. This situation is more suitable for high-voltage platforms (such as 800V). It is worth noting that Figure 6 In cases (i) and (ii), the three phases are connected in star shape, and in case (iii), the three phases are connected in triangle shape. This is only an illustration, and the present application does not limit the connection method between the three-phase windings. For example, a three-phase winding with 6 branches in series can also form a star connection, and a three-phase winding with 6 branches in series-parallel form can also form a triangle connection.

[0034] Reference Figure 7 , taking one phase (for example, U phase) winding as an example, the stator wire embedding method of the present application is introduced.

[0035] First, overall, the flat wire winding of each phase occupies 3 consecutive winding slots at each pole. For example, in this embodiment, the U-phase winding occupies slots 1 to 3 at the first pole and slots 10 to 12 at the second pole.

[0036] Secondly, looking at a single branch, the winding of each branch continuously crosses the layers and embeds the wires between the 1st and 2nd layers, and traverses each pole in the circumferential direction, then continuously crosses the layers and embeds the wires between the 3rd and 4th layers, and traverses each pole in the circumferential direction, then continuously crosses the layers and embeds the wires between the 5th and 6th layers, and traverses each pole in the circumferential direction. Specifically, taking branch A as an example, following the winding sequence, A1 is in the 1st layer, A2 spans to the 2nd layer, A3 spans to the 1st layer, A4 spans to the 2nd layer... until it extends to A6, and all six poles of the 1st and 2nd layers are traversed. Then, the branch crosses the layers and embeds the wires between the 3rd and 4th layers, A7 spans to the 3rd layer, A8 spans to the 4th layer, A9 spans to the 3rd layer, A10 spans to the 4th layer... until it extends to A12, and all six poles of the 3rd and 4th layers are traversed. Then, the branch crosses the layers and embeds the wires between the 5th and 6th layers.

[0037] This wire embedding method makes the incoming wire end of each branch located at the radial innermost side and the outgoing wire end of each branch located at the radial outermost side; or the incoming wire end of each branch located at the radial outermost side and the outgoing wire end of each branch located at the radial innermost side.

[0038] Between the 1st and 2nd layers, between the 3rd and 4th layers, and between the 5th and 6th layers, the span of the winding (i.e., the slot distance between adjacent wire-embedded slots) is 9. Since the number of slots per pole and per phase is 9, the windings of the same branch are embedded in the slots of the same phase between the 1st and 2nd layers, between the 3rd and 4th layers, and between the 5th and 6th layers. For example, the windings occupying three consecutive winding slots at each pole are defined as the first slot, the second slot, and the third slot. In this embodiment, the winding positions A1 to A6 located at the 1st or 2nd layer are all located at the first slot, the winding positions A7 to A12 located at the 3rd or 4th layer are all located at the third slot, and the winding positions A13 to A18 located at the 5th or 6th layer are all located at the second slot.

[0039] There is another rule in the above: the slots where the windings of each branch are embedded in the first and second layers, the slots where the windings are embedded in the third and fourth layers, and the slots where the windings are embedded in the fifth and sixth layers are different from each other. That is, the slots corresponding to the above three layers are the first slot, the second slot, and the third slot (also referred to as the first slot, the third slot, and the second slot).

[0040] Under the premise of satisfying the above rules, the windings of a branch located at the 1st and 2nd layers (or the windings located at the 3rd and 4th layers, or the windings located at the 5th and 6th layers) are specifically embedded in the first slot, the second slot, or the third slot, which is not limited in this application. For example, the windings of branch B located at the 1st and 2nd layers are embedded in the second slot, and the windings of branch B located at the 3rd and 4th layers are embedded in the first slot.

[0041] The above-mentioned wire embedding method makes the span of each branch winding between the 2nd and 3rd layers and between the 4th and 5th layers 8 or 11. For example, from A6 to A7, it is from slot 46 to slot 3, and the span is 11; from A12 to A13, it is from slot 48 to slot 2, and the span is 8.

[0042] The above-mentioned wire embedding rules make the wave winding structure completely symmetrical on the magnetic circuit, and the number of slots embedded in each branch in each layer is the same, and the number of branches corresponding to each slot is the same.

[0043] In addition, in this embodiment, the incoming terminals (A1, B1, C1, D1, E1 and F1) of the six branches are located at adjacent poles, and the outgoing terminals (A18, B18, C18, D18, E18 and F18) of the six branches are located at adjacent poles. This makes the busbar structure simple and saves space when the busbar is used.

[0044] It should be understood that the above-mentioned embodiments and some aspects or features thereof may be appropriately combined.

[0045] Of course, the present application is not limited to the above-mentioned embodiments. Under the guidance of the present application, those skilled in the art may make various modifications to the above-mentioned embodiments of the present application without departing from the scope of the present application.

Claims

1. A stator of a flat wire motor, comprising an iron core and a flat wire winding, wherein the flat wire winding has a three-phase winding, the number of poles of the flat wire winding is 6, and the number of winding slots of the iron core is 54. It is characterized in that The flat wire winding forms 6 layers in the slots, and the flat wire winding of each phase includes 6 branches. The flat wire winding of each phase occupies three consecutive winding slots at each pole, namely the first slot position, the second slot position and the third slot position. The winding of each branch is embedded in the same slot in the first and second layers, in the same slot in the third and fourth layers, and in the same slot in the fifth and sixth layers, and the slots embedded in the first and second layers, in the third and fourth layers, and in the fifth and sixth layers of the winding of each branch are different from each other. The winding of each branch is continuously embedded across layers between the 1st and 2nd layers and traverses each pole in the circumferential direction, then continuously embedded across layers between the 3rd and 4th layers and traverses each pole in the circumferential direction, then continuously embedded across layers between the 5th and 6th layers and traverses each pole in the circumferential direction.

2. The stator of the flat wire motor according to claim 1, It is characterized in that The intervals between adjacent slots in which the winding of each branch is embedded between the first layer and the second layer, between the third layer and the fourth layer, and between the fifth layer and the sixth layer are all 9.

3. The stator of the flat wire motor according to claim 1, It is characterized in that The intervals between adjacent slots in which the winding of each branch is embedded between the 2nd layer and the 3rd layer and between the 4th layer and the 5th layer are 8 or 11.

4. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that Each branch is wound in the form of a continuous wave winding.

5. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that The six branches are connected in series.

6. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that Every three branches of the six branches are connected in series to form a small branch, and two of the small branches are connected in parallel.

7. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that Every two branches of the six branches are connected in series to form a small branch, and three of the small branches are connected in parallel.

8. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that The inlet end of each branch is located at the innermost side in the radial direction, and the outlet end of each branch is located at the outermost side in the radial direction; or The inlet end of each branch is located at the outermost side in the radial direction, and the outlet end of each branch is located at the innermost side in the radial direction.

9. The stator of the flat wire motor according to any one of claims 1 to 3, It is characterized in that The incoming terminals of the six branches of each phase are located at two adjacent poles, and the outgoing terminals of the six branches of each phase are located at two adjacent poles.

10. A flat wire motor, It is characterized in that A stator comprising the flat wire motor according to any one of claims 1 to 9.

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